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JP4695975B2 - Insulated composite container - Google Patents

Insulated composite container Download PDF

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Publication number
JP4695975B2
JP4695975B2 JP2005366025A JP2005366025A JP4695975B2 JP 4695975 B2 JP4695975 B2 JP 4695975B2 JP 2005366025 A JP2005366025 A JP 2005366025A JP 2005366025 A JP2005366025 A JP 2005366025A JP 4695975 B2 JP4695975 B2 JP 4695975B2
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cup
paper cup
composite container
paper
plastic
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JP2007168820A (en
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卓 加戸
憲一 遠藤
浩二 石川
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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Description

本発明は、外包装体の紙カップと内包装体のプラスチックカップとを一体とした二重構造の断熱複合容器に関するものである。   The present invention relates to a heat insulating composite container having a double structure in which a paper cup of an outer package and a plastic cup of an inner package are integrated.

一般に、外包装体の紙カップと内包装体のプラスチックカップとを一体とした二重構造の断熱複合容器に関しては、数多くの形態が提案され、実用化されている。特に、内容物として電子レンジで調理する食品等が収納された状態で販売され、消費者はそのまま電子レンジで加熱調理して食することができるという便利な断熱複合容器が実用化されている。従来の外包装体の紙カップPとしては、図7に示すように、通常の紙カップと同様に、胴部材10と底部材20とからなり、胴部材10は主に胴部11を形成し、上端を外側にカールしてトップカール部12とし、下端を内側に折り返して折り返し部13としている。なお、このトップカール部12を設けない形状とすることもある。一方、底部材20は主に底面部21を形成し、外周縁部を下方へ略直角に屈曲して屈曲部22としている。胴部材10と底部材20の接合は、底部材20の屈曲部22を、胴部材10の折り返し部13と、胴部11の下端部とで挟んで加熱圧着している。この底部材20の屈曲部22を挟み込んで接合した部分を糸じり部Zと称し、底面部21を上げ底にしている。   In general, a number of forms have been proposed and put to practical use for a double-structured insulated composite container in which a paper cup for an outer package and a plastic cup for an inner package are integrated. In particular, a convenient heat-insulating composite container that is sold in a state where food or the like to be cooked in a microwave oven is stored as a content and that can be cooked and eaten in a microwave oven as it is has been put into practical use. As shown in FIG. 7, the conventional paper cup P of the outer packaging body is composed of a barrel member 10 and a bottom member 20 as in a normal paper cup. The barrel member 10 mainly forms a barrel portion 11 and has an upper end. Is curled outward to form a top curl portion 12, and a lower end is folded inward to form a folded portion 13. The top curl portion 12 may not be provided. On the other hand, the bottom member 20 mainly forms a bottom surface portion 21, and the outer peripheral edge portion is bent downward at a substantially right angle to form a bent portion 22. The body member 10 and the bottom member 20 are joined by thermocompression bonding with the bent portion 22 of the bottom member 20 sandwiched between the folded portion 13 of the body member 10 and the lower end portion of the body portion 11. A portion where the bent portion 22 of the bottom member 20 is sandwiched and joined is referred to as a yarn twisting portion Z, and the bottom surface portion 21 is raised.

また、外包装体の紙カップと内包装体のプラスチックカップとを一体とする方法は、図8−aに示すように、内包装体のプラスチックカップ3の上端の開口部を、外包装体の紙カップPの上端部で巻き込んで一体とする方法、あるいは、図8−bに示すように、外包装体の紙カップPの胴部11と内包装体のプラスチックカップ3の胴部21と嵌合、もしくは部分的に接着して一体とする方法等がある(例えば特許文献1を参照。)。
特開昭59−26405号公報
Further, as shown in FIG. 8A, the method of integrating the paper cup of the outer package and the plastic cup of the inner package is to open the upper end of the plastic cup 3 of the inner package so that the paper cup of the outer package. A method in which the upper end of P is wound and integrated, or as shown in FIG. 8B, the body 11 of the paper cup P of the outer package and the body 21 of the plastic cup 3 of the inner package are fitted, or There is a method of partially bonding and integrating them (for example, see Patent Document 1).
JP 59-26405 A

しかしながら、底部に糸じり部Zを備えた形状の紙カップを外包装体とした場合、内包装体に内容物が収納された断熱複合容器を電子レンジで加熱調理した時に、紙カップの底の糸じり部Zに焦げを生じることがあるという問題がある。その原因は、つぎのように考えられる。紙の材料のパルプのセルロースは基本的には電子レンジのマイクロ波を吸収する。従って、紙の重なる部分では、紙厚が増し発熱量が増す。しかし、表面積は小さく熱の放出量が少なく、発生した熱を蓄積することになり、温度が上昇し、焦げを発生させる原因となっている。また、糸じり部Zの内外の両側からマイクロ波が照射されることも、焦げを発生させる原因となっている。つまり、通常の紙カップでは、図7に示すように、胴部材10と底部材20の接合部位として糸じり部Zと称する接合部を持つ構造であるため、この糸じり部Zは、内容物に触れることななく、畜熱されやすく、内外の両側からマイクロ波が照射さるために焦げが生じやすい。ただし、内容物を直接紙カップに入れた場合には、紙に発生し蓄積された熱が内容物に奪われるため焦げが発生しにくくなるが、内容物が外包装体の紙カップに直接接触しない二重構造の断熱複合容器の場合には、特に糸じり部Zに焦げが発生しやすいという問題がある。   However, when a paper cup having a shape with a threaded portion Z at the bottom is used as an outer package, when the heat-insulated composite container containing the contents in the inner package is cooked in a microwave oven, the yarn at the bottom of the paper cup There is a problem that a burnt portion Z may be burnt. The cause is considered as follows. The cellulose in the paper material pulp basically absorbs microwave microwaves. Therefore, the paper thickness increases and the heat generation amount increases in the overlapping portion of the paper. However, the surface area is small and the amount of heat released is small, so that the generated heat is accumulated, causing the temperature to rise and causing scorching. In addition, irradiation with microwaves from both the inside and outside of the yarn twisting portion Z also causes a burn. That is, in a normal paper cup, as shown in FIG. 7, since it has a structure having a joining portion called a yarn twisting portion Z as a joining portion of the body member 10 and the bottom member 20, the yarn twisting portion Z includes the contents. Without touching the object, the animal is easily heated, and microwaves are radiated from both the inside and outside, so that charring is likely to occur. However, when the contents are put directly into the paper cup, the heat generated and accumulated on the paper is taken away by the contents, so that it is difficult to cause scorching, but the contents do not directly contact the paper cup of the outer package. In the case of a heat insulating composite container having a heavy structure, there is a problem that scorching is likely to occur particularly in the yarn twisting portion Z.

本発明は、上記のような問題点を解決するためになされたものであり、その目的とするところは、外包装体の紙カップと内包装体のプラスチックカップとからなる二重構造の断熱複合容器であって、内包装体のプラスチックカップの中に、飲料や即席食品などの内容物を入れ、電子レンジで加熱調理した時に、洩れることなく、紙カップのどの部分、特に、糸じり部にも焦げが発生しない断熱複合容器を提供することを目的とするものである。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a double-layer insulated composite container comprising a paper cup for an outer package and a plastic cup for an inner package. However, when contents such as beverages and instant foods are put in a plastic cup of the inner package and cooked in a microwave oven, it does not leak, and it does not leak into any part of the paper cup, especially the threaded part. An object of the present invention is to provide a heat-insulating composite container that does not burn.

上記目的を達成するために、本発明は、外包装体の紙カップと内包装体のプラスチックカップとを、前記紙カップの上端部で前記プラスチックカップを嵌合し、前記プラスチックカップが、前記紙カップによって宙吊りになった状態で一体とした二重構造の断熱複合容器であって、前記紙カップが胴部材と底部材とからなり、前記胴部材は主に胴部を形成し、下端を内側に折り返して折り返し部とし、前記底部材は主に底面部を形成し、外周縁部を下方へ略直角に屈曲して屈曲部とし、該屈曲部を、前記胴部材の前記折り返し部と、前記胴部の下端部とで挟んで加熱圧着して内側部分の幅が5mmを超える糸じり部を形成し、前記底面部を外方に弧状で凹状に形成し、前記プラスチックカップの底部の形状は、前記紙カップの前記底面部の弧状に沿った形状で外側に膨らんだ形状とし、一部または全部で前記底面部の中央の最深部の内面で接する形状とし、前記底面部の最下端の外面と胴部材の糸じり部の下端により形成される下端面との距離を5mm以下したことを特徴とする断熱複合容器である。
In order to achieve the above object, according to the present invention, a paper cup of an outer package and a plastic cup of an inner package are fitted to the plastic cup at the upper end of the paper cup, and the plastic cup is suspended by the paper cup. In this state, the paper cup is composed of a body member and a bottom member, and the body member mainly forms a body portion, and the lower end is folded back inward. The bottom member mainly forms a bottom surface portion, and the outer peripheral edge portion is bent downward at a substantially right angle to form a bent portion. The bent portion is the folded portion of the trunk member and the lower end of the trunk portion. width of the inner portion to form a yarn butt portion exceeding 5mm by thermocompression bonding by sandwiching between parts, the bottom part is formed in a concave shape in arc outwardly to the shape of the bottom of the plastic cup, the paper cup The bottom arc of And bulged outwardly in a shape along the, a shape with some or all contact with the inner surface of the deepest part of the center of the bottom portion, the lower end of the thread galling of the lowermost end of the outer surface and the body member of the bottom portion It is the heat insulation composite container characterized by having made the distance with the lower end surface formed of 5 mm or less.

本発明によれば、外包装体の紙カップと内包装体のプラスチックカップとを一体とした二重構造の断熱複合容器であって、外包装体の紙カップの底面部を下方に凹状に形成し、底面部の最下端の外面と胴部材の糸じり部の下端により形成される下端面との距離を5mm以下とすることによって、断熱複合容器の中に、飲料や即席食品などの内容物を入れ、電子レンジで加熱調理した時に、外包装体、特に糸じり部に焦げを発生させることのない断熱複合容器を得ることができるという効果を有している。   According to the present invention, a double-structured heat-insulating composite container in which a paper cup of an outer package and a plastic cup of an inner package are integrated, the bottom of the paper cup of the outer package is formed in a concave shape downward, By setting the distance between the outermost surface of the bottom end of the bottom surface and the bottom surface formed by the lower end of the threaded portion of the body member to 5 mm or less, contents such as beverages and instant foods can be placed in the heat insulating composite container. When it is put and cooked in a microwave oven, there is an effect that it is possible to obtain a heat-insulated composite container that does not cause scorching in the outer package, in particular, the yarn thread portion.

以下に、図面を参照しながら、本発明の実施の形態について、さらに詳しく説明する。なお、説明を簡単にするため、各図の対応する部位には同じ符号を付している。図1は本発明に係る断熱複合容器の一実施形態を示すもので、左半分及び右半分をそれぞれ断面図と正面図で示す概略構成図であり、図2は本発明に係る断熱複合容器の外包装体の紙カップと内包装体のプラスチックカップの嵌合前の状態を示す断面図であり、図3は本発明に係る断熱複合容器の胴部材ブランクおよび底部材ブランクを示す展開図であり、図4は本発明に係る断熱複合容器の外包装体の紙カップを作成する工程を示す図であり、図5は本発明に係る断熱複合容器の外包装体の紙カップを作成する別の工程を示す図であり、図6は本発明に係る断熱複合容器の外包装体と内包装体とを嵌合する方法を示す正面図であり、図7は従来の断熱複合容器の外包装体の紙カップの嵌合前の状態を示す断面図であり、そして、図8は従来の断熱複合容器の外包装体と内包装体とを一体とする方法の例を示す部分拡大断面図である。   Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. For the sake of simplicity, the same reference numerals are assigned to corresponding parts in the drawings. FIG. 1 shows one embodiment of a heat insulating composite container according to the present invention, and is a schematic configuration diagram showing a left half and a right half in a sectional view and a front view, respectively, and FIG. 2 shows a heat insulating composite container according to the present invention. FIG. 3 is a sectional view showing a state before the paper cup of the outer package body and the plastic cup of the inner package body are fitted, and FIG. 3 is a development view showing the body member blank and the bottom member blank of the heat insulating composite container according to the present invention; FIG. 4 is a diagram showing a process of creating a paper cup for an outer package of an insulated composite container according to the present invention, and FIG. 5 shows another process of creating a paper cup for an outer package of an insulated composite container according to the present invention. FIG. 6 is a front view showing a method of fitting the outer packaging body and the inner packaging body of the heat insulating composite container according to the present invention, and FIG. 7 is a diagram of the paper cup of the outer packaging body of the conventional heat insulating composite container. FIG. 8 is a cross-sectional view showing a state before fitting, and FIG. An outer package and an inner package of the heat-insulating composite container is a partially enlarged cross-sectional view showing an example of a method for integrally.

図1は本発明に係る断熱複合容器の一実施形態を示すもので、左半分及び右半分をそれぞれ断面図と正面図で示す概略構成図であり、同図の断熱複合容器Aは、上方に開口した逆円錐台形形状の外包装体の紙カップ1と、上方に開口した内包装体のプラスチックカップ3とから構成されている。外包装体の紙カップ1と内包装体のプラスチックカップ3は、それぞれの胴部上部で嵌合され一体となっている。すなわち、紙カップ1の胴部11の上端部とプラスチックカップ3の胴部21の上端部とを貼り合わせて、底面部21を凹状とした紙カップ1とプラスチックカップ3とを一体としている。   FIG. 1 shows an embodiment of a heat insulating composite container according to the present invention, and is a schematic configuration diagram showing a left half and a right half in a sectional view and a front view, respectively. The paper cup 1 is a reverse frustoconical outer packaging body that is open, and the plastic cup 3 is an inner packaging body that opens upward. The paper cup 1 of the outer wrapping body and the plastic cup 3 of the inner wrapping body are fitted and integrated with each other at the upper part of the body portion. That is, the upper end portion of the body portion 11 of the paper cup 1 and the upper end portion of the body portion 21 of the plastic cup 3 are bonded together so that the paper cup 1 and the plastic cup 3 having the bottom surface portion 21 concave are integrated.

外包装体の紙カップ1は、図2−aに示すように、胴部材10と底部材20とからなる逆円錐台形形状であり、一般的な紙カップ成形機により成形される。胴部材10は主に胴部11を形成し、上端を外側にカールしてトップカール部12とし、下端を内側に折り返して折り返し部13としている。なお、このトップカール部12を設けない形状とすることもある。一方、底部材20は主に底面部21を形成し、外周縁部を下方へ略直角に屈曲して屈曲部22としている。胴部材10と底部材20の接合は、底部材20の屈曲部22を、胴部材10の折り返し部13と、胴部11の下端部とで挟んで加熱圧着して底部材20の屈曲部22を挟み込んで接合した部分を糸じり部Zを形成している。この糸じり部Zの内側部分の幅を5mmを超える寸法としている。   As shown in FIG. 2A, the outer packaging paper cup 1 has an inverted frustoconical shape composed of a body member 10 and a bottom member 20, and is formed by a general paper cup molding machine. The body member 10 mainly forms a body part 11, the upper end is curled outward to form a top curl part 12, and the lower end is folded inward to form a folded part 13. The top curl portion 12 may not be provided. On the other hand, the bottom member 20 mainly forms a bottom surface portion 21, and the outer peripheral edge portion is bent downward at a substantially right angle to form a bent portion 22. For joining the body member 10 and the bottom member 20, the bent portion 22 of the bottom member 20 is sandwiched between the folded-back portion 13 of the body member 10 and the lower end portion of the body portion 11 and is heat-pressed to bend. The thread-bonded portion Z is formed by joining the portions sandwiched between the two. The width of the inner portion of the thread twist portion Z is set to a dimension exceeding 5 mm.

また、本発明の断熱複合容器Aでは、底部材20の底面部21は内面から見て外方に凹状に変形された形状をしている。この形状は、底面部21の全面を弧状で凹状とすることが好ましい。   Moreover, in the heat insulation composite container A of this invention, the bottom face part 21 of the bottom member 20 is carrying out the shape deform | transformed into concave shape outward seeing from the inner surface. As for this shape, it is preferable to make the whole surface of the bottom face part 21 into an arc shape and a concave shape.

また、底面部21の最下端の外面と胴部材10の糸じり部Zの下端により形成される下端面Xとの距離xは、5mm以下とする。距離xが5mmを超えた場合には、糸じり部Zの焦げの発生を防ぐ効果が減少してしまう。なお、紙カップの大きさ(開口部の内径、底部の外径、高さ等)は、特に限定されないが、開口部の径は30〜200mmの範囲が好ましく、底部の外径は20〜150mmの範囲が好ましく、高さは30〜200mmの範囲が好ましい。   Further, the distance x between the outermost surface of the bottom end portion 21 and the lower end surface X formed by the lower end of the threaded portion Z of the body member 10 is 5 mm or less. When the distance x exceeds 5 mm, the effect of preventing the yarn twisting portion Z from being burnt is reduced. The size of the paper cup (the inner diameter of the opening, the outer diameter of the bottom, the height, etc.) is not particularly limited, but the diameter of the opening is preferably in the range of 30 to 200 mm, and the outer diameter of the bottom is 20 to 150 mm. The range is preferable, and the height is preferably in the range of 30 to 200 mm.

本発明による本発明の断熱複合容器Aの紙カップ1に使用される紙の材料構成としては、紙を主強度材とし、熱可塑性樹脂層を積層することを基本としている。例えば、紙/ポリエチレン、ポリエチレン/紙、ポリエチレン/紙/ポリエチレン、ポリプロピレン/紙/ポリプロピレン、紙/ポリエチレン/アルミニウム/ポリエチレン、ポリエチレン/紙/ポリエチレン/アルミニウム/ポリエチレン、ポリエチレン/アルミニウム/紙/ポリエチレン等があげられる。紙には腰(剛性)があり、カール等の加工適性に優れたカップ原紙が好適に使用され、その斤量は150〜400g/m2の範囲のものを使用し、好ましくは200〜350g/m2の範囲のものを使用する。斤量が150g/m2未満の場合、嵌合が緩くなり、400g/m2を超えた場合、嵌合しにくくなる。 The material composition of the paper used for the paper cup 1 of the heat insulating composite container A of the present invention according to the present invention is based on laminating a thermoplastic resin layer with paper as the main strength material. For example, paper / polyethylene, polyethylene / paper, polyethylene / paper / polyethylene, polypropylene / paper / polypropylene, paper / polyethylene / aluminum / polyethylene, polyethylene / paper / polyethylene / aluminum / polyethylene, polyethylene / aluminum / paper / polyethylene, etc. It is done. A cup base paper having a low stiffness (rigidity) and having excellent processability such as curling is preferably used, and the weight of the cup is 150 to 400 g / m 2 , preferably 200 to 350 g / m. Use one in the range of 2 . When the weight is less than 150 g / m 2 , the fitting becomes loose, and when it exceeds 400 g / m 2 , the fitting becomes difficult.

紙カップ1に対する印刷は、公知の印刷方式によって板紙のシート段階での加工が可能である。この印刷効果を従来の断熱性プラスチック容器の曲面印刷と比較すると、インキ濃度、微細性、印刷効率等の点で優れており、紙カップ1は、消費者に内容物に関する情報を伝達する優れた情報媒体となるばかりか、食卓の雰囲気にあったデザインを施すことが可能となる。   The printing on the paper cup 1 can be processed at the paperboard sheet stage by a known printing method. Compared with the curved surface printing of conventional heat-insulating plastic containers, this printing effect is superior in terms of ink density, fineness, printing efficiency, etc., and the paper cup 1 is excellent information that conveys information about the contents to consumers. Not only will it become a medium, it will be possible to apply designs that match the atmosphere of the dining table.

つぎに、本発明の断熱複合容器Aの外包装体の紙カップ1を製造する方法を説明する。   Below, the method to manufacture the paper cup 1 of the outer package body of the heat insulation composite container A of this invention is demonstrated.

嵌合する前の紙カップ1は、図3に示すような胴部材ブランク10Aと底部材ブランク20Aとから、紙カップ成型機で成型される。一般的に、胴部材ブランク10Aは、あらかじめ前工程で打ち抜かれたものを使用し、底部材ブランク20Aは、紙カップ成型機上で打ち抜かれる。   The paper cup 1 before being fitted is molded by a paper cup molding machine from a body member blank 10A and a bottom member blank 20A as shown in FIG. In general, the body member blank 10A is previously punched in the previous process, and the bottom member blank 20A is punched on a paper cup molding machine.

まず、図3に示すような胴部材ブランク10Aと底部材ブランク20Aとを使用して紙カップ1を作製されるが、その製造方法は、大きく二つの方法に分けることができる。   First, the paper cup 1 is manufactured using the trunk member blank 10 </ b> A and the bottom member blank 20 </ b> A as shown in FIG. 3, and the manufacturing method can be roughly divided into two methods.

一つの方法は、図4に示すように、まず一般的な紙カップと同様な形状の紙カップを作製する。この底部材20の変形前の紙カップの製造は、紙カップ成型機で一般的な紙カップと同様に成型することができる。一般的に、胴部材ブランク10Aは、あらかじめ前工程で打ち抜かれたものを使用し、底部材ブランク20Aは、紙カップ成型機上で打ち抜かれる。この底面部が底上げとなっている紙カップをつぎの工程で底面部を下方に凹状に変形して弧状の底面部21とする方法である。   In one method, as shown in FIG. 4, a paper cup having the same shape as a general paper cup is first prepared. The paper cup before the deformation of the bottom member 20 can be manufactured in the same manner as a general paper cup by a paper cup molding machine. In general, the body member blank 10A is previously punched in the previous process, and the bottom member blank 20A is punched on a paper cup molding machine. This is a method in which the paper cup having the bottom portion raised to the bottom is deformed into a concave shape downward in the following process to form an arc-shaped bottom portion 21.

もう一つの方法は、図5に示すように、予め、胴部材10と底部材20とを別の工程で加工しておく。そして、つぎの工程で、筒状に成形した胴部材10と弧状の底面部21を有する底部材20とを、底部材10の屈曲部22を胴部材10の折り返し部13と胴部11の下端部とで挟んで接合する方法である。   In another method, as shown in FIG. 5, the body member 10 and the bottom member 20 are processed in advance in separate steps. Then, in the next step, the barrel member 10 formed into a cylindrical shape and the bottom member 20 having the arc-shaped bottom surface portion 21, the bent portion 22 of the bottom member 10, the folded portion 13 of the trunk member 10, and the lower end of the barrel portion 11. It is the method of joining by pinching | interposing with a part.

一方、内包装体のプラスチックカップ3は、図2−bに示すように、プラスチックシートの成形により形成される。プラスチックシートの材料としては、特に、限定されるものではなく、例えば、ポリプロピレン樹脂、ポリエチレン樹脂、ポリエチレンテレフタレート樹脂、ポリスチレン樹脂、ポリ塩化ビニル樹脂、酢酸ビニル共重合体等があげられる。また、これらの樹脂の積層体、例えば、ポリプロピレン樹脂/酢酸ビニル共重合体/ポリプロピレン樹脂からなる積層体等を使用することもできる。あるいは、これらの樹脂に珪酸マグネシウム等のフィラーを混入して使用することもできる。プラスチックシートの厚さは0.3〜3.0mmの範囲のものを使用し、好ましくは0.5〜2.0mmの範囲のものを使用する。厚さが0.3mm未満の場合、プラスチックカップ3の強度が弱く嵌合しなくなり、3.0mmを超えた場合、成形加工がしにくくなる。   On the other hand, the plastic cup 3 of the inner package is formed by molding a plastic sheet as shown in FIG. The material for the plastic sheet is not particularly limited, and examples thereof include polypropylene resin, polyethylene resin, polyethylene terephthalate resin, polystyrene resin, polyvinyl chloride resin, and vinyl acetate copolymer. In addition, a laminate of these resins, for example, a laminate comprising a polypropylene resin / vinyl acetate copolymer / polypropylene resin can be used. Alternatively, a filler such as magnesium silicate can be mixed in these resins. The plastic sheet has a thickness of 0.3 to 3.0 mm, preferably 0.5 to 2.0 mm. When the thickness is less than 0.3 mm, the strength of the plastic cup 3 is weak and does not fit, and when it exceeds 3.0 mm, the molding process becomes difficult.

このプラスチックカップ3は、これらの樹脂からなるプラスチックシートを真空成形あるいは圧空成形により成形することにより、胴部31と底部32とからなるカップ形状に形成されている。また、胴部31の上端からは外方にフランジ部33が形成されている。   The plastic cup 3 is formed in a cup shape composed of a body portion 31 and a bottom portion 32 by molding a plastic sheet made of these resins by vacuum forming or pressure forming. A flange portion 33 is formed outward from the upper end of the body portion 31.

上記の紙カップ1の中にプラスチックカップ3を嵌合して本発明の断熱複合容器とするが、充填、蓋シールを終わったプラスチックカップ3を紙カップ1内に挿入して嵌合する。この嵌合は空のプラスチックカップ3に対して紙カップ1を嵌合させ、その後に充填、蓋シールを行ってもよい。その嵌合は、紙カップ1に対して、図6−aに示すように、プラスチックカップ3を単に上方から落とし込んで、プラスチックカップ3が紙カップ1の上縁部に嵌合するまで押し込めばよく、また逆に、図6−bに示すように、プラスチックカップ3の方に紙カップ1を下方から被せるように押し込んでもよい。このようにして組み合わされた二重構造の断熱複合容器Aにおいて、外包装体の紙カップ1は上記の嵌合によって内包装体のプラスチックカップ3と一体化し、両者の胴部11と胴部31の間に空間4が形成され、この空間4によって、断熱複合容器Aに断熱性が賦与される。   The plastic cup 3 is fitted into the paper cup 1 to form the heat insulating composite container of the present invention. The plastic cup 3 after filling and lid sealing is inserted into the paper cup 1 and fitted. In this fitting, the paper cup 1 may be fitted to the empty plastic cup 3, and then filling and lid sealing may be performed. 6-a, the plastic cup 3 is simply dropped from above and pushed into the paper cup 1 until the plastic cup 3 is fitted to the upper edge of the paper cup 1. Conversely, as shown in FIG. 6B, the plastic cup 3 may be pushed so as to cover the paper cup 1 from below. In the heat insulating composite container A having a double structure combined as described above, the paper cup 1 of the outer package is integrated with the plastic cup 3 of the inner package by the above-described fitting, and the body portion 11 and the body portion 31 of both of them are integrated. A space 4 is formed therebetween, and the space 4 imparts heat insulation to the heat insulating composite container A.

内包装体のプラスチックカップ3は、図1に示すように、外包装体の紙カップ1によって宙吊りになった状態である。従って、プラスチックカップ3の形状は紙カップ1の空間3内であれば自由であるが、内包装体3の底部31の形状は、外包装体1の底面部21の凹状に沿った形状で外側に膨らんだ形状とし、一部または全部で底面部21の内面に接する形状とすることが好ましい。糸じり部Zの全周に渡って焦げを防止するために、底面部21の中央の最深部の内面で接する形状とすることが好ましい。   As shown in FIG. 1, the plastic cup 3 of the inner package is suspended from the paper cup 1 of the outer package. Therefore, the shape of the plastic cup 3 is free as long as it is within the space 3 of the paper cup 1, but the shape of the bottom 31 of the inner package 3 is a shape along the concave shape of the bottom surface 21 of the outer package 1 and outward. It is preferable to have a swelled shape and a shape that is partly or entirely in contact with the inner surface of the bottom surface portion 21. In order to prevent scorching over the entire circumference of the yarn twisting portion Z, it is preferable to have a shape that is in contact with the inner surface of the deepest portion at the center of the bottom surface portion 21.

なお、図示されていないが、プラスチックカップ3に内容物充填後、フィルム蓋材をフランジ部33に熱シールするか、あるいは、開口部全体を覆うようにオーバーキャップを施すようにしてもよい。   Although not shown, after filling the contents into the plastic cup 3, the film lid may be heat-sealed to the flange portion 33, or an overcap may be applied to cover the entire opening.

外包装体の紙カップ1と内包装体のプラスチックカップ3の嵌合の度合いは、紙カップ1およびプラスチックカップ3の材料の剛性、復元性等の要因によっても決まるが、部分的に接着して一体としてもよいが、必ずしも、両者を分離不能に強固に嵌合させる必要はなく、使用後は、指先でプラスチックカップ3のフランジ部33と紙カップ1の底部22を持って引き離せば分離可能な程度に嵌合しておれば十分である。むしろその方が、使用後の分別廃棄に有効である。   The degree of fitting of the paper cup 1 of the outer package and the plastic cup 3 of the inner package is determined by factors such as the rigidity and resilience of the material of the paper cup 1 and the plastic cup 3, but is partially bonded and integrated. However, it is not always necessary to fit the two firmly in an inseparable manner, and after use, the fingers 33 hold the flange 33 of the plastic cup 3 and the bottom 22 of the paper cup 1 so that they can be separated. It is sufficient if they are fitted. Rather, it is more effective for separation and disposal after use.

つぎに、本発明の断熱複合容器について実施例をあげて、さらに具体的に説明する。なお、本発明はこれによって限定されるものではない。   Next, the heat insulating composite container of the present invention will be described more specifically with reference to examples. In addition, this invention is not limited by this.

内容物が調理済みの食品を収納した電子レンジ用の断熱複合容器を作製した。 まず、内包装体のプラスチックカップ3を作製した。材料として、ポリプロピレン0.55mm/酢酸ビニル共重合体0.15mm/ポリプロピレン0.55mmからなる積層体(厚み1.25mm)を使用し、圧空・真空成形法で成形して、高さが73mm、開口部の内径が81mmで底部31が外側に膨らんだ内容量280ccのプラスチックカップを作製した。その胴部の上端部には上端から下方に垂直に長辺部6.5mm、長辺部の下端から直角に内方に伸びる短辺部1mmからなるL字形状のスタックリブを設けた。   A heat-insulated composite container for a microwave oven containing the cooked food contents was prepared. First, the plastic cup 3 of the inner package was produced. As a material, a laminated body (thickness: 1.25 mm) composed of polypropylene 0.55 mm / vinyl acetate copolymer 0.15 mm / polypropylene 0.55 mm is formed by compressed air / vacuum forming method, the height is 73 mm, A plastic cup having an inner volume of 280 cc with an inner diameter of the opening of 81 mm and a bottom 31 bulging outward was produced. An L-shaped stack rib having a long side portion of 6.5 mm vertically downward from the upper end and a short side portion of 1 mm extending inward from the lower end of the long side portion at right angles was provided on the upper end portion of the trunk portion.

一方、別に外包装体の紙カップ1を作製した。胴部材1の材料として、表面からカップ原紙280g/m2/低密度ポリエチレン樹脂μmの構成の材料を使用し、底部材2の材料として、表面からカップ原紙255g/m2/低密度ポリエチレン樹脂25μmの構成の材料を使用した。まず、図3のような胴部ブランク10Aに打ち抜き、この胴部ブランク10Aをマンドレルに巻き付け、筒状の胴部材10に形成した。つぎに、一般的な紙カップの成形機で、胴部材10の下方から底部ブランク20Aを嵌め込み、接着部分を熱風で加熱し、胴部材10の下端を内側に折り返して折り返し部13とし、胴部材10と底部材20を接合し、この接合した部分の糸じり部Zの内側の幅を10mmとした。つづいて、胴部材10の上端を外側にカールしトップカール部12を形成した。作製した紙カップの底面部21をつぎの工程で下方に凹状に変形して、底面部21の最下端の外面と胴部材10の糸じり部Zの下端により形成される下端面Xとの距離xが4mmである弧状の底面部21として図6に示すような紙カップ1を作成した。このようにして高さが77mm、開口部の内径が80.5mm、胴部下端の外径が66mm、胴部のテーパー角度が略5度である図2−aに示すような紙カップ1を作製した。 On the other hand, a paper cup 1 as an outer package was produced separately. As the material of the body member 1, a material having a configuration of 280 g / m 2 / low density polyethylene resin μm from the surface is used as the material of the body member, and as the material of the bottom member 2, 255 g / m 2 of cup base paper / 25 μm of low density polyethylene resin from the surface The material of the composition was used. First, the body blank 10 </ b> A as shown in FIG. 3 was punched out, and the body blank 10 </ b> A was wound around a mandrel to form a tubular body member 10. Next, with a general paper cup molding machine, the bottom blank 20A is fitted from below the barrel member 10, the bonded portion is heated with hot air, and the lower end of the barrel member 10 is folded inward to form the folded portion 13. And the bottom member 20 were joined, and the inner width of the joined portion Z was 10 mm. Subsequently, the upper end of the body member 10 was curled outward to form a top curl portion 12. The bottom portion 21 of the produced paper cup is deformed downward in the next step, and the distance between the outermost surface of the bottom end portion 21 and the lower end surface X formed by the lower end of the thread-binding portion Z of the body member 10. A paper cup 1 as shown in FIG. 6 was prepared as an arc-shaped bottom part 21 with x being 4 mm. In this way, a paper cup 1 as shown in FIG. 2A having a height of 77 mm, an opening inner diameter of 80.5 mm, a barrel lower end outer diameter of 66 mm, and a barrel taper angle of approximately 5 degrees is produced. did.

つぎに、内容物を充填し、蓋材をフランジ部33でシールした内包装体のプラスチックカップ3を外包装体の紙カップ1の中に上方から落とし込んで、プラスチックカップ3が紙カップ1の上端部に嵌合するまで押し込んで嵌合し、外包装体の紙カップ1と内包装体とプラスチックカップ3を一体化した、両者の胴部11と胴部31の間に空間4を有する断熱複合容器Aを作製した。   Next, the plastic cup 3 of the inner package body filled with the contents and sealed with the flange portion 33 is dropped into the paper cup 1 of the outer package body from above, and the plastic cup 3 is placed on the upper end of the paper cup 1. A heat insulating composite container A having a space 4 between the body part 11 and the body part 31, in which the paper cup 1 of the outer packaging body, the inner packaging body, and the plastic cup 3 are integrated, is pushed in until fitted. Produced.

この実施例の断熱複合容器Aでは、底部材10の凹状の底面部21の最下端の外面と胴部材10の糸じり部Zの下端により形成される下端面Xとの距離xが4mmにすることによって、内容物を入れ、電子レンジで加熱調理した時に、紙カップ1のどの部分、特に糸じり部Zにも焦げの発生が見られなかった。また、手で持っても熱くなく電子レンジから容易に取り出すことができ、食卓でも容器を持つことができた。また、使用時に、外包装体の紙カップ1から内包装体のプラスチックカップ3が抜け出すことはなく、使用後に、プラスチックカップ3を紙カップ1から、簡単に手で取り外し、廃棄することができた。   In the heat insulating composite container A of this embodiment, the distance x between the lowermost outer surface of the concave bottom surface portion 21 of the bottom member 10 and the lower end surface X formed by the lower end of the threaded portion Z of the body member 10 is 4 mm. As a result, when the contents were put and cooked in a microwave oven, no charring was observed in any part of the paper cup 1, in particular, the yarn twisting part Z. In addition, even if it was held by hand, it was not hot and could be easily taken out from the microwave oven, and it was possible to have a container at the table. Moreover, the plastic cup 3 of the inner package did not come out of the paper cup 1 of the outer package during use, and the plastic cup 3 could be easily removed from the paper cup 1 by hand and discarded after use.

本発明の断熱複合容器の用途は、電子レンジで調理する全ての内容物に対応することができる容器であり、特に、調理済み食品、インスタントラーメンなどの温める即席食品用の容器、あるいはコーヒー、紅茶、スープなどの熱い飲料用の容器等に利用することができる。   The use of the heat-insulated composite container of the present invention is a container that can handle all contents cooked in a microwave oven, and in particular, a container for cooked food, a heated instant food such as instant noodles, coffee, tea, etc. It can be used for containers for hot beverages such as soups.

本発明に係る断熱複合容器の一実施形態を示すもので、左半分及び右半分をそれぞれ断面図と正面図で示す概略構成図である。BRIEF DESCRIPTION OF THE DRAWINGS It shows one Embodiment of the heat insulation composite container which concerns on this invention, and is a schematic block diagram which shows a left half and a right half with sectional drawing and a front view, respectively. 本発明に係る断熱複合容器の外包装体の紙カップと内包装体のプラスチックカップの嵌合前の状態を示す断面図である。It is sectional drawing which shows the state before the fitting of the paper cup of the outer packaging body of the heat insulation composite container which concerns on this invention, and the plastic cup of an inner packaging body. 本発明に係る断熱複合容器の胴部材ブランクおよび底部材ブランクを示す展開図である。It is an expanded view which shows the trunk | drum member blank and bottom member blank of the heat insulation composite container which concerns on this invention. 本発明に係る断熱複合容器の外包装体の紙カップを作成する工程を示す図である。It is a figure which shows the process of creating the paper cup of the outer package body of the heat insulation composite container which concerns on this invention. 本発明に係る断熱複合容器の外包装体の紙カップを作成する別の工程を示す図である。It is a figure which shows another process of creating the paper cup of the outer package body of the heat insulation composite container which concerns on this invention. 本発明に係る断熱複合容器の外包装体と内包装体とを嵌合する方法を示す正面図である。It is a front view which shows the method of fitting the outer package body and inner package body of the heat insulation composite container which concerns on this invention. 従来の断熱複合容器の外包装体の紙カップの嵌合前の状態を示す断面図である。It is sectional drawing which shows the state before the fitting of the paper cup of the outer package body of the conventional heat insulation composite container. 従来の断熱複合容器の外包装体と内包装体とを一体とする方法の例を示す部分拡大断面図である。It is a partial expanded sectional view which shows the example of the method of uniting the outer package body and inner package body of the conventional heat insulation composite container.

符号の説明Explanation of symbols

A 断熱複合容器
1 紙カップ
P 従来の紙カップ
3 プラスチックカップ
4 空間
10 胴部材
10A 胴部材ブランク
11 胴部
12 トップカール部
13 折り返し部
20 底部材
20A 底部材ブランク
21 底面部
22 屈曲部
31 胴部
32 底部
33 フランジ部
Z 糸じり部
X 下端面 x 距離(底面部21の最下端の外面と下端面Xとの距離)
A Insulated Composite Container 1 Paper Cup P Conventional Paper Cup 3 Plastic Cup 4 Space 10 Body Member 10A Body Member Blank 11 Body 12 Top Curl Part 13 Folded Part 20 Bottom Member 20A Bottom Member Blank 21 Bottom Part 22 Bent Part 31 Body 32 Bottom 33 Flange part Z Yarn twisting part X Lower end surface x Distance (Distance between the outermost surface of the bottom end 21 and the lower end surface X)

Claims (1)

外包装体の紙カップと内包装体のプラスチックカップとを、前記紙カップの上端部で前記プラスチックカップを嵌合し、前記プラスチックカップが、前記紙カップによって宙吊りになった状態で一体とした二重構造の断熱複合容器であって、
前記紙カップが胴部材と底部材とからなり、前記胴部材は主に胴部を形成し、下端を内側に折り返して折り返し部とし、前記底部材は主に底面部を形成し、外周縁部を下方へ略直角に屈曲して屈曲部とし、該屈曲部を、前記胴部材の前記折り返し部と、前記胴部の下端部とで挟んで加熱圧着して内側部分の幅が5mmを超える糸じり部を形成し、前記底面部を外方に弧状で凹状に形成し、前記プラスチックカップの底部の形状は、前記紙カップの前記底面部の弧状に沿った形状で外側に膨らんだ形状とし、一部または全部で前記底面部の中央の最深部の内面で接する形状とし、前記底面部の最下端の外面と胴部材の糸じり部の下端により形成される下端面との距離を5mm以下したことを特徴とする断熱複合容器。
A double cup structure in which the paper cup of the outer package and the plastic cup of the inner package are fitted to each other at the upper end of the paper cup, and the plastic cup is suspended from the paper cup. An insulated composite container,
The paper cup is composed of a barrel member and a bottom member. The barrel member mainly forms a barrel portion, and a lower end is folded inward to form a folded portion. The bottom member mainly forms a bottom portion, and an outer peripheral edge portion is formed. Bending downward substantially at a right angle to form a bent portion, and the bent portion is sandwiched between the folded portion of the body member and the lower end portion of the body portion, and is heat-pressed to produce an inner portion having a width exceeding 5 mm. The bottom portion of the plastic cup is formed in an outwardly arcuate and concave shape, and the shape of the bottom of the plastic cup is a shape along the arc of the bottom of the paper cup. The shape is in contact with the inner surface of the deepest part at the center of the bottom part in the whole or the whole, and the distance between the outermost surface of the bottom part of the bottom part and the lower end face formed by the lower end of the thread binding part of the body member is 5 mm or less. An insulated composite container characterized by that.
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JP2002211533A (en) * 2001-01-19 2002-07-31 Dainippon Printing Co Ltd Heat insulation paper cup corresponding to microwave oven
JP2003002373A (en) * 2001-06-20 2003-01-08 Dainippon Printing Co Ltd Paper cup for microwave oven
JP2005263295A (en) * 2004-03-19 2005-09-29 Dainippon Printing Co Ltd Heat-insulating composite container

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